1213211767 has 2 divisors, whose sum is σ = 1213211768. Its totient is φ = 1213211766.

The previous prime is 1213211743. The next prime is 1213211773. The reversal of 1213211767 is 7671123121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213211767 - 2⁷ = 1213211639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213211707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606605883 + 606605884.

It is an arithmetic number, because the mean of its divisors is an integer number (606605884).

Almost surely, 2^1213211767 is an apocalyptic number.

1213211767 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213211767 is an equidigital number, since it uses as much as digits as its factorization.

1213211767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528, while the sum is 31.

The square root of 1213211767 is about 34831.1895719914. The cubic root of 1213211767 is about 1066.5442319216.

Adding to 1213211767 its reverse (7671123121), we get a palindrome (8884334888).

The spelling of 1213211767 in words is "one billion, two hundred thirteen million, two hundred eleven thousand, seven hundred sixty-seven".